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Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Building Cisco Remote Access Networks

Download or read book Building Cisco Remote Access Networks written by Wayne Lawson and published by Elsevier. This book was released on 2000-11-15 with total page 609 pages. Available in PDF, EPUB and Kindle. Book excerpt: An increasing number of companies are designing and implementing Remote Access Networks, which allow users who are not physically connected to a Wide Area Network (WAN) or Local Area Network (LAN) to access the network's servers, applications and databases or to participate in video conferencing and conference calls. The ability for a remote user to function as if they were in the next office dramatically improves overall efficiency while reducing total cost of ownership. Cisco Systems, the world's largest internetworking vendor, is the pioneer of the enabling technologies for Remote Access Networks. This book will identify and explain all of the Cisco products necessary for designing and building a remote access network and integrating it with legacy systems.This book is a professional reference detailing all of the strategies, tactics and methods for designing, configuring and maintaining Cisco Remote Access Networks. It will include thorough discussions of all Cisco Access Servers and routers.* Demand for information on remote access networks is growing quickly at corporate and administrator level* Cisco remote access networks appeal to businesses as they provide efficient and secure connectivity at reduced cost* Book includes thorough discussions of all Cisco Access Servers and routers

Book CCNP  Building Cisco Remote Access Networks Study Guide  Exam 642 821

Download or read book CCNP Building Cisco Remote Access Networks Study Guide Exam 642 821 written by Robert Padjen and published by Sybex. This book was released on 2003-12-26 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the book you need to prepare the latest Building Cisco Remote Access Networks (BCRAN) exam, 642-821. This Study Guide provides: * In-depth coverage of key exam topics * Practical information on planning, configuring, and troubleshooting Cisco remote access networks * Hundreds of challenging review questions * Leading-edge exam preparation software, including a test engine, sample simulation questions, and electronic flashcards Authoritative coverage of all exam objectives, including: * Providing remote access to a network with asynchronous dial-in, Frame Relay, ISDN, cable modem, and DSL * Managing traffic flow on WAN links * Using PPP as an access and encapsulation method * Configuring access control to manage and limit remote access * Configuring VPN operation using Cisco IOS * Configuring Network Address Translation (NAT) * Planning a Cisco ISDN solution for remote access or primary link back-up * Design a Cisco frame relay infrastructure * Troubleshooting non-functional remote access systems * Troubleshooting traffic control problems on a WAN link

Book CCNA Security 210 260 Official Cert Guide

Download or read book CCNA Security 210 260 Official Cert Guide written by Omar Santos and published by Cisco Press. This book was released on 2015-09-01 with total page 1419 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trust the best selling Official Cert Guide series from Cisco Press to help you learn, prepare, and practice for exam success. They are built with the objective of providing assessment, review, and practice to help ensure you are fully prepared for your certification exam. --Master Cisco CCNA Security 210-260 Official Cert Guide exam topics --Assess your knowledge with chapter-opening quizzes --Review key concepts with exam preparation tasks This is the eBook edition of the CCNA Security 210-260 Official Cert Guide. This eBook does not include the companion CD-ROM with practice exam that comes with the print edition. CCNA Security 210-260 Official Cert Guide presents you with an organized test-preparation routine through the use of proven series elements and techniques. “Do I Know This Already?” quizzes open each chapter and enable you to decide how much time you need to spend on each section. Exam topic lists make referencing easy. Chapter-ending Exam Preparation Tasks help you drill on key concepts you must know thoroughly. CCNA Security 210-260 Official Cert Guide focuses specifically on the objectives for the Cisco CCNA Security exam. Networking Security experts Omar Santos and John Stuppi share preparation hints and test-taking tips, helping you identify areas of weakness and improve both your conceptual knowledge and hands-on skills. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics. Well regarded for its level of detail, assessment features, comprehensive design scenarios, and challenging review questions and exercises, this official study guide helps you master the concepts and techniques that will enable you to succeed on the exam the first time. The official study guide helps you master all the topics on the CCNA Security exam, including --Networking security concepts --Common security threats --Implementing AAA using IOS and ISE --Bring Your Own Device (BYOD) --Fundamentals of VPN technology and cryptography --Fundamentals of IP security --Implementing IPsec site-to-site VPNs --Implementing SSL remote-access VPNs using Cisco ASA --Securing Layer 2 technologies --Network Foundation Protection (NFP) --Securing the management plane on Cisco IOS devices --Securing the data plane --Securing routing protocols and the control plane --Understanding firewall fundamentals --Implementing Cisco IOS zone-based firewalls --Configuring basic firewall policies on Cisco ASA --Cisco IPS fundamentals --Mitigation technologies for e-mail- and web-based threats --Mitigation technologies for endpoint threats CCNA Security 210-260 Official Cert Guide is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit http://www.cisco.com/web/learning/index.html.

Book Building Data Centers with VXLAN BGP EVPN

Download or read book Building Data Centers with VXLAN BGP EVPN written by Lukas Krattiger and published by Cisco Press. This book was released on 2017-04-04 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complete guide to building and managing next-generation data center network fabrics with VXLAN and BGP EVPN This is the only comprehensive guide and deployment reference for building flexible data center network fabrics with VXLAN and BGP EVPN technologies. Writing for experienced network professionals, three leading Cisco experts address everything from standards and protocols to functions, configurations, and operations. The authors first explain why and how data center fabrics are evolving, and introduce Cisco’s fabric journey. Next, they review key switch roles, essential data center network fabric terminology, and core concepts such as network attributes, control plane details, and the associated data plane encapsulation. Building on this foundation, they provide a deep dive into fabric semantics, efficient creation and addressing of the underlay, multi-tenancy, control and data plane interaction, forwarding flows, external interconnectivity, and service appliance deployments. You’ll find detailed tutorials, descriptions, and packet flows that can easily be adapted to accommodate customized deployments. This guide concludes with a full section on fabric management, introducing multiple opportunities to simplify, automate, and orchestrate data center network fabrics. Learn how changing data center requirements have driven the evolution to overlays, evolved control planes, and VXLAN BGP EVPN spine-leaf fabrics Discover why VXLAN BGP EVPN fabrics are so scalable, resilient, and elastic Implement enhanced unicast and multicast forwarding of tenant traffic over the VXLAN BGP EVPN fabric Build fabric underlays to efficiently transport uni- and multi-destination traffic Connect the fabric externally via Layer 3 (VRF-Lite, LISP, MPLS L3VPN) and Layer 2 (VPC) Choose your most appropriate Multi-POD, multifabric, and Data Center Interconnect (DCI) options Integrate Layer 4-7 services into the fabric, including load balancers and firewalls Manage fabrics with POAP-based day-0 provisioning, incremental day 0.5 configuration, overlay day-1 configuration, or day-2 operations

Book CCNP  Building Cisco MultiLayer Switched Networks Study Guide

Download or read book CCNP Building Cisco MultiLayer Switched Networks Study Guide written by Terry Jack and published by John Wiley & Sons. This book was released on 2006-02-20 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the book you need to prepare for Cisco's Building Cisco Multilayer Switched Networks (BCMSN) exam, 642-811. This Study Guide provides: In-depth coverage of key exam topics Practical information on designing and implementing multilayer switched networks Hundreds of challenging review questions Leading-edge exam preparation software, including a test engine, and electronic flashcards Authoritative coverage of all exam objectives, including: Utilizing the Enterprise Composite Model for designing networks Using the Switching Database Manager within a Catalyst switch Operating managed VLAN services on a switched network Configuring and verifying 802.1Q and ISL trunks Configuring access ports for static and multi-VLAN membership Increasing bandwidth for interswitch connections with Fast EtherChannel and Gigabit EtherChannel Enabling Spanning Tree Protocol on ports and VLANs Converting CatOS to native IOS on Catalyst switches Implementing IP telephony in a switched network environment Planning, configuring, and implementing QOS Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

Book CCNP  Building Scalable Cisco Internetworks Study Guide

Download or read book CCNP Building Scalable Cisco Internetworks Study Guide written by Carl Timm and published by Sybex. This book was released on 2003-12-09 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the book you need to prepare for Cisco's Building Scalable Cisco Internetworks (BSCI) exam, 642-801. This Study Guide provides: In-depth coverage of key exam topics Practical information on designing and implementing scalable Cisco internetworks Hundreds of challenging review questions Leading-edge exam preparation software, including a test engine, and electronic flashcards Authoritative coverage of all exam objectives, including: Using classful, classless, distance vector, and link state routing protocols Using VLSM to extend IP addresses Configuring EIGRP, OSPF, BGP, and IS-IS environments Configuring and verifying router redistribution in a network Configuring policy-based routing using route maps Utilizing the three-layer hierarchical design model Identifying IP addressing schemes, including features of IPv6 Verifying OSPF operation in a single and multiple areas Ensuring proper operation of Integrated IS-IS on Cisco routers Interpreting the output of various show and debug commands Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

Book Integrated Security Technologies and Solutions   Volume II

Download or read book Integrated Security Technologies and Solutions Volume II written by Aaron Woland and published by Cisco Press. This book was released on 2019-03-28 with total page 1017 pages. Available in PDF, EPUB and Kindle. Book excerpt: The essential reference for security pros and CCIE Security candidates: identity, context sharing, encryption, secure connectivity and virtualization Integrated Security Technologies and Solutions – Volume II brings together more expert-level instruction in security design, deployment, integration, and support. It will help experienced security and network professionals manage complex solutions, succeed in their day-to-day jobs, and prepare for their CCIE Security written and lab exams. Volume II focuses on the Cisco Identity Services Engine, Context Sharing, TrustSec, Application Programming Interfaces (APIs), Secure Connectivity with VPNs, and the virtualization and automation sections of the CCIE v5 blueprint. Like Volume I, its strong focus on interproduct integration will help you combine formerly disparate systems into seamless, coherent, next-generation security solutions. Part of the Cisco CCIE Professional Development Series from Cisco Press, it is authored by a team of CCIEs who are world-class experts in their Cisco security disciplines, including co-creators of the CCIE Security v5 blueprint. Each chapter starts with relevant theory, presents configuration examples and applications, and concludes with practical troubleshooting. Review the essentials of Authentication, Authorization, and Accounting (AAA) Explore the RADIUS and TACACS+ AAA protocols, and administer devices with them Enforce basic network access control with the Cisco Identity Services Engine (ISE) Implement sophisticated ISE profiling, EzConnect, and Passive Identity features Extend network access with BYOD support, MDM integration, Posture Validation, and Guest Services Safely share context with ISE, and implement pxGrid and Rapid Threat Containment Integrate ISE with Cisco FMC, WSA, and other devices Leverage Cisco Security APIs to increase control and flexibility Review Virtual Private Network (VPN) concepts and types Understand and deploy Infrastructure VPNs and Remote Access VPNs Virtualize leading Cisco Security products Make the most of Virtual Security Gateway (VSG), Network Function Virtualization (NFV), and microsegmentation

Book CCNP Practical Studies

Download or read book CCNP Practical Studies written by Wesley Shuo and published by Cisco Press. This book was released on 2003 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: bull; Prepare for the CCNP 642-821 BCRAN exam and gain a better, practical understanding of exam concepts bull; Experience how remote access concepts work in a real network with practice labs that walk you through their implementation bull; Review set-up guides that show you how to prepare a lab for study bull; Ready yourself for the new simulation-based questions on the CCNP exams

Book CCNP  Cisco Internetwork Troubleshooting Study Guide

Download or read book CCNP Cisco Internetwork Troubleshooting Study Guide written by Arthur Pfund and published by John Wiley & Sons. This book was released on 2006-02-20 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: Here's the book you need to prepare the latest Cisco Internetwork Troubleshooting Support (CIT) exam, 642-831. This Study Guide provides: In-depth coverage of key exam topics Practical information on troubleshooting and optimizing Cisco internetworks Hundreds of challenging review questions Leading-edge exam preparation software, including a test engine, sample simulation questions, and electronic flashcards Authoritative coverage of all exam objectives, including: Establishing an optimal system baseline Diagramming and documenting system topology and end system configuration Verifying connectivity at all layers Selecting an optimal troubleshooting approach Planning a network documentation system and baseline monitoring scheme Using Cisco IOS commands and applications to identify and isolate system problems Resolving sub-optimal system performance problems Restoring optimal baseline service Working with external providers and system users to resolve service provision problems Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.

Book Inside Cisco IOS Software Architecture

Download or read book Inside Cisco IOS Software Architecture written by Vijay Bollapragada and published by Cisco Press. This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cisco's Internetwork Operating Systems (IOS) software provides the means by which networking professionals configure and manage Cisco networking devices. Comprehending what happens inside Cisco routers helps network designers and engineers perform their jobs more effectively--an important part of any CCIE candidate's self-study program.

Book IKEv2 IPsec Virtual Private Networks

Download or read book IKEv2 IPsec Virtual Private Networks written by Graham Bartlett and published by Cisco Press. This book was released on 2016-08-10 with total page 1639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Create and manage highly-secure Ipsec VPNs with IKEv2 and Cisco FlexVPN The IKEv2 protocol significantly improves VPN security, and Cisco’s FlexVPN offers a unified paradigm and command line interface for taking full advantage of it. Simple and modular, FlexVPN relies extensively on tunnel interfaces while maximizing compatibility with legacy VPNs. Now, two Cisco network security experts offer a complete, easy-tounderstand, and practical introduction to IKEv2, modern IPsec VPNs, and FlexVPN. The authors explain each key concept, and then guide you through all facets of FlexVPN planning, deployment, migration, configuration, administration, troubleshooting, and optimization. You’ll discover how IKEv2 improves on IKEv1, master key IKEv2 features, and learn how to apply them with Cisco FlexVPN. IKEv2 IPsec Virtual Private Networks offers practical design examples for many common scenarios, addressing IPv4 and IPv6, servers, clients, NAT, pre-shared keys, resiliency, overhead, and more. If you’re a network engineer, architect, security specialist, or VPN administrator, you’ll find all the knowledge you need to protect your organization with IKEv2 and FlexVPN. Understand IKEv2 improvements: anti-DDoS cookies, configuration payloads, acknowledged responses, and more Implement modern secure VPNs with Cisco IOS and IOS-XE Plan and deploy IKEv2 in diverse real-world environments Configure IKEv2 proposals, policies, profiles, keyrings, and authorization Use advanced IKEv2 features, including SGT transportation and IKEv2 fragmentation Understand FlexVPN, its tunnel interface types, and IOS AAA infrastructure Implement FlexVPN Server with EAP authentication, pre-shared keys, and digital signatures Deploy, configure, and customize FlexVPN clients Configure, manage, and troubleshoot the FlexVPN Load Balancer Improve FlexVPN resiliency with dynamic tunnel source, backup peers, and backup tunnels Monitor IPsec VPNs with AAA, SNMP, and Syslog Troubleshoot connectivity, tunnel creation, authentication, authorization, data encapsulation, data encryption, and overlay routing Calculate IPsec overhead and fragmentation Plan your IKEv2 migration: hardware, VPN technologies, routing, restrictions, capacity, PKI, authentication, availability, and more

Book Storage Implementation in vSphere 5 0

Download or read book Storage Implementation in vSphere 5 0 written by Muhammad Afaq Khan and published by Pearson Education. This book was released on 2009-09-16 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough introduction to the ASR 1000 series router Building Service-Aware Networks is the insider’s guide to the next-generation Aggregation Services Router (ASR) 1000. Authored by a leading Cisco® expert, this book offers practical, hands-on coverage for the entire system lifecycle, including planning, setup and configuration, migration, and day-to-day management. Muhammad Afaq Khan systematically introduces the ASR 1000’s evolved architecture, showing how the ASR 1000 can deliver major performance and availability improvements in tomorrow’s complex, collaborative, mobile, and converged network environments. Then, to help you plan your network deployments more effectively, the author walks you through realistic deploy-ment scenarios for IP routing, IP services, WAN optimization services, security services, and unified communications. He presents a wide variety of realistic, easy-to-adapt configuration examples for enterprise and provider inetworks, including everything from command-line interface (CLI) snippets to best practices for troubleshooting. Understand tomorrow’s enterprise business requirements, the demand they create for routing infrastructure, and how the ASR 1000 meets them Leverage the ASR 1000’s revolutionary system architecture to dramatically improve performance and availability Select and qualify an enterprise edge platform for next-generation WANs Understand ASR 1000 series architecture, hardware, software, packaging, licensing, and releases Perform initial ASR 1000 setup and configuration Implement In Service Software Upgrades (ISSU) Size routers for enterprise and carrier environments Consolidate multiple applications, platforms, and functions onto the ASR 1000 Troubleshoot ASR 1000 common system error messages, step by step This book is part of the Networking Technology Series from Cisco Press®, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Book Cisco ISE for BYOD and Secure Unified Access

Download or read book Cisco ISE for BYOD and Secure Unified Access written by Jamey Heary and published by Cisco Press. This book was released on 2013-06-07 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plan and deploy identity-based secure access for BYOD and borderless networks Using Cisco Secure Unified Access Architecture and Cisco Identity Services Engine, you can secure and regain control of borderless networks in a Bring Your Own Device (BYOD) world. This book covers the complete lifecycle of protecting a modern borderless network using these advanced solutions, from planning an architecture through deployment, management, and troubleshooting. Cisco ISE for BYOD and Secure Unified Access begins by reviewing the business case for an identity solution. Next, you’ll walk through identifying users, devices, and security posture; gain a deep understanding of Cisco’s Secure Unified Access solution; and master powerful techniques for securing borderless networks, from device isolation to protocol-independent network segmentation. You’ll find in-depth coverage of all relevant technologies and techniques, including 802.1X, profiling, device onboarding, guest lifecycle management, network admission control, RADIUS, and Security Group Access. Drawing on their cutting-edge experience supporting Cisco enterprise customers, the authors present detailed sample configurations to help you plan your own integrated identity solution. Whether you’re a technical professional or an IT manager, this guide will help you provide reliable secure access for BYOD, CYOD (Choose Your Own Device), or any IT model you choose. Review the new security challenges associated with borderless networks, ubiquitous mobility, and consumerized IT Understand the building blocks of an Identity Services Engine (ISE) solution Design an ISE-Enabled network, plan/distribute ISE functions, and prepare for rollout Build context-aware security policies Configure device profiling, endpoint posture assessments, and guest services Implement secure guest lifecycle management, from WebAuth to sponsored guest access Configure ISE, network access devices, and supplicants, step-by-step Walk through a phased deployment that ensures zero downtime Apply best practices to avoid the pitfalls of BYOD secure access Simplify administration with self-service onboarding and registration Deploy Security Group Access, Cisco’s tagging enforcement solution Add Layer 2 encryption to secure traffic flows Use Network Edge Access Topology to extend secure access beyond the wiring closet Monitor, maintain, and troubleshoot ISE and your entire Secure Unified Access system

Book Cisco Software Defined Wide Area Networks

Download or read book Cisco Software Defined Wide Area Networks written by Jason Gooley and published by Cisco Press. This book was released on 2020-09-04 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the eBook edition of Cisco Software-Defined Wide-Area Networks. This eBook does not include access to the companion website with practice exam that comes with the print edition. Access to the video mentoring is available through product registration at Cisco Press; or see the instructions in the back pages of your eBook. This study guide from Cisco Press will help you learn, prepare, and practice for exam success. This guide is built with the objective of providing assessment, review, and practice to help ensure you are prepared for your certification exam. Master Cisco Implementing Cisco SD-WAN Solutions (ENSDWI 300-415) exam topics Assess your knowledge with chapter-opening quizzes Review key concepts with exam preparation tasks Cisco Software-Defined Wide-Area Networks presents you with an organized test preparation routine using proven series elements and techniques. Key Topic tables help you drill on key concepts you must know thoroughly. Chapter-ending Review Questions help you to review what you learned in the chapter. Cisco Software-Defined Wide-Area Networks focuses specifically on the objectives for the Implementing Cisco SD-WAN Solutions (ENSDWI 300-415) exam. Four leading Cisco technology experts share preparation hints and test-taking tips, helping you improve both your conceptual knowledge and hands-on skills. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics. Well regarded for its level of detail, assessment features, comprehensive design scenarios, this study guide helps you master the concepts and techniques that will enable you to succeed on the exam the first time. The official study guide helps you master all the topics on the Implementing Cisco SD-WAN Solutions (ENSDWI 300-415) exam, including: Architecture Controller Deployment Router Deployment Policies Security and Quality of Service Management and Operations Cisco Software-Defined Wide-Area Networks is part of a recommended learning path from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit http://www.cisco.com/web/learning/index.html

Book Connecting Networks Companion Guide

Download or read book Connecting Networks Companion Guide written by Cisco Networking Academy and published by Pearson Education. This book was released on 2014 with total page 569 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This course discusses the WAN technologies and network services required by converged applications in a complex network. The course allows you to understand the selection criteria of network devices and WAN technologies to meet network requirements. You will learn how to configure and troubleshoot network devices and resolve common issues with data link protocols. You will also develop the knowledge and skills needed to implement IPSec and virtual private network (VPN) operations in a complex network."--Back cover.

Book Building Wireless Community Networks

Download or read book Building Wireless Community Networks written by Rob Flickenger and published by "O'Reilly Media, Inc.". This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building Wireless Community Networks is about getting people online using wireless network technology. The 802.11b standard (also known as WiFi) makes it possible to network towns, schools, neighborhoods, small business, and almost any kind of organization. All that's required is a willingness to cooperate and share resources. The first edition of this book helped thousands of people engage in community networking activities. At the time, it was impossible to predict how quickly and thoroughly WiFi would penetrate the marketplace. Today, with WiFi-enabled computers almost as common as Ethernet, it makes even more sense to take the next step and network your community using nothing but freely available radio spectrum. This book has showed many people how to make their network available, even from the park bench, how to extend high-speed Internet access into the many areas not served by DSL and cable providers, and how to build working communities and a shared though intangible network. All that's required to create an access point for high-speed Internet connection is a gateway or base station. Once that is set up, any computer with a wireless card can log onto the network and share its resources. Rob Flickenger built such a network in northern California, and continues to participate in network-building efforts. His nuts-and-bolts guide covers: Selecting the appropriate equipment Finding antenna sites, and building and installing antennas Protecting your network from inappropriate access New network monitoring tools and techniques (new) Regulations affecting wireless deployment (new) IP network administration, including DNS and IP Tunneling (new) His expertise, as well as his sense of humor and enthusiasm for the topic, makes Building Wireless Community Networks a very useful and readable book for anyone interested in wireless connectivity.

Book Network World

    Book Details:
  • Author :
  • Publisher :
  • Release : 1995-05-15
  • ISBN :
  • Pages : 60 pages

Download or read book Network World written by and published by . This book was released on 1995-05-15 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.